Spectrum of a frequency modulated pulse width modulation signal

KILINÇ S., Cabuk G.

INTERNATIONAL JOURNAL OF CIRCUIT THEORY AND APPLICATIONS, cilt.43, sa.3, ss.390-400, 2015 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 43 Sayı: 3
  • Basım Tarihi: 2015
  • Doi Numarası: 10.1002/cta.1948
  • Dergi Adı: INTERNATIONAL JOURNAL OF CIRCUIT THEORY AND APPLICATIONS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.390-400
  • Anahtar Kelimeler: Pulse width modulation, switched mode power supplies, frequency modulation, spectral analysis, EMISSIONS, EMI
  • Dokuz Eylül Üniversitesi Adresli: Evet

Özet

In power electronics, the switching elements are controlled by pulse width modulated (PWM) signals making their currents on and off repeatedly. This might cause electromagnetic interference (EMI) problems especially in switched mode power supplies. One method for mitigating the EMI is to use the frequency modulation technique in the control signal of the switching metal-oxide-semiconductor field-effect transistor. According to this approach, frequency of the PWM signal is modulated in order to spread its spectrum and hence reduce the EMI levels. This paper presents the theoretical analysis for the spectrum of a frequency modulated PWM signal. Copyright (c) 2013 John Wiley & Sons, Ltd.